.TH asinhf 3 "" "" ""
.SH SYNOPSIS
asinh, asinhf \- inverse hyperbolic sine 
.SH ANSI_SYNOPSIS
#include <math.h>
.br
double asinh(double 
.IR x );
.br
float asinhf(float 
.IR x );
.br
.SH TRAD_SYNOPSIS
#include <math.h>
.br
double asinh(
.IR x )
.br
double 
.IR x ;
.br

float asinhf(
.IR x )
.br
float 
.IR x ;
.br
.SH DESCRIPTION
.BR asinh 
calculates the inverse hyperbolic sine of 
.IR x .
.BR asinh 
is defined as 
@ifinfo
. sgn(
.IR x )
* log(abs(
.IR x )
+ sqrt(1+
.IR x *<[x]>))
@end ifinfo
@tex
$$sign(x) \times ln\Bigl(|x| + \sqrt{1+x^2}\Bigr)$$
@end tex

.BR asinhf 
is identical, other than taking and returning floats.
.SH RETURNS
.BR asinh 
and 
.BR asinhf 
return the calculated value.
.SH PORTABILITY
Neither 
.BR asinh 
nor 
.BR asinhf 
are ANSI C.
.SH SOURCE
src/newlib/libm/mathfp/s_asinh.c
